1#!/bin/sh 2 3# 4# Copyright (c) 2010 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30 31# Test overcommit of the file system capacity 32# Causes panic: 1 vncache entries remaining 33 34# Scanario by kib@ 35 36[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 37 38. ../default.cfg 39 40here=`pwd` 41cd /tmp 42sed '1,/^EOF/d' < $here/$0 > mmap4.c 43cc -o mmap4 -Wall -O2 mmap4.c 44rm -f mmap4.c 45 46mount | grep -q "$mntpoint" && umount $mntpoint 47mdconfig -l | grep -q $mdstart && mdconfig -d -u $mdstart 48 49mdconfig -a -t swap -s 40m -u $mdstart 50bsdlabel -w md${mdstart} auto 51 52newfs -U md${mdstart}${part} > /dev/null 53mount /dev/md${mdstart}${part} $mntpoint 54 55/tmp/mmap4 /$mntpoint/file 56ls -lh $mntpoint 57df -h 58 59cd $here 60rm -f /tmp/mmap4 61 62while mount | grep -q $mntpoint; do 63 sync;sync;sync 64 sleep 1 65 umount $mntpoint 66done 67 68mdconfig -d -u $mdstart 69exit 0 70EOF 71#include <sys/types.h> 72#include <err.h> 73#include <stdio.h> 74#include <stdlib.h> 75#include <unistd.h> 76#include <fcntl.h> 77#include <sys/mman.h> 78#include <sys/param.h> 79#include <string.h> 80#include <unistd.h> 81#include <errno.h> 82 83#define STARTADDR 0x0U 84#define ADRSPACE 0x06400000U /* 100 Mb */ 85 86int 87main(int argc, char **argv) 88{ 89 int fd, ps; 90 void *p; 91 size_t len; 92 char *c, *path; 93 94 p = (void *)STARTADDR; 95 len = ADRSPACE; 96 97 path = argv[1]; 98 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) 99 err(1,"open()"); 100 if (ftruncate(fd, len) == -1) 101 err(1, "ftruncate"); 102 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 103 MAP_FAILED) { 104 if (errno == ENOMEM) 105 return (1); 106 err(1, "mmap(1)"); 107 } 108 109 c = p; 110 ps = getpagesize(); 111 for (c = p; (void *)c < p + len; c += ps) { 112 *c = 1; 113 } 114 115 close(fd); 116 117 return (0); 118} 119